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Finding the Fourth Proportional to 393.07, 541.99 and 260.40

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Solution

The fourth proportional to 393.07, 541.99 and 260.40 is: 359.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.07 : 541.99 = 260.40 : x
  2. Step 2: Convert to fraction form
    393.07/541.99 = 260.40/x
  3. Step 3: Cross multiply
    393.07x = 541.99 × 260.40
  4. Step 4: Simplify right side
    393.07x = 141,134.20
  5. Step 5: Solve for x
    x = 141,134.20/393.07
  6. Step 6: Final answer
    x = 359.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.